starshaker, do you find cold makes your nipples worse/triggers painful episodes?
I am 9 weeks pregnant, and have had v v painful nipples from the word go. When nicely warm, they are just a bit sensitive, but getting cold, even for a brief moment, gives me about half an hour or more of burning soreness.
I found this info about 'nipple vasospasm' - www.thewomens.org.au/nipplevasospasm -which describes what I experience very accurately, even down to the weird 'traffic light' nipple colour changes.
I jam a hot water bottle down me jumper when I can - great at home, less practical at work or out and about, especially if you haven't gone public about your pregnancy.
My magic trick has been heat pads - the stick on ones you can get for period pain and back pain etc - stuck to the inside of my top over my boobs, or onto a vest, so they're hidden (not directly over the nipples, I think that's asking for trouble - just a bit higher). The heat pads aren't completely invisible, but a big well draped scarf or tank top covers the dodgy area, as well as being an extra layer of bosom heating. They've been a huge help.
(I ended up ordering a lot of Curaheat pads from an online chemist to save money. They aren't that cheap, unfortunately, but I'm so grateful for the pain relief. Cos they really are painful when they kick off!)